Group of copper engraved maps with detailed plans of Chinese fortifications. 1 - Vusihyen / Hou Tcheou Fou, with two bird's-eye plans (5.7 x 8.6"). 2 - Plan de la Ville de Hang-Tcheou-Fou...Capitale de la province de Che-Kiang (6.2 x 8.2"). 3 - Plan de l' Enceinte de la Ville de Nan-King Capitale de la province de Kyang-nan / Plan de la Ville de Su-Tcheou-Fou, with two plans (10.6 x 8.2"). 4 - Villes de la Province de Chensi, showing two maps (Si-ngan-fu and Tchouang Lan ou Chwang Ian) (11 x 8").